summaryrefslogtreecommitdiff
path: root/src/mesa/drivers/svga/svgamesa.c
blob: 4ce7343c52375af755fe588bd40f20c813a31ac5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
/* $Id: svgamesa.c,v 1.14 2001/03/03 20:33:29 brianp Exp $ */

/*
 * Mesa 3-D graphics library
 * Version:  3.3
 * Copyright (C) 1995-2000  Brian Paul
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */


/*
 * SVGA driver for Mesa.
 * Original author:  Brian Paul
 * Additional authors:  Slawomir Szczyrba <steev@hot.pl>  (Mesa 3.2)
 */


#ifdef HAVE_CONFIG_H
#include "conf.h"
#endif

#ifdef SVGA

#ifdef PC_HEADER
#include "all.h"
#else
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <vga.h>
#include "GL/svgamesa.h"
#include "context.h"
#include "extensions.h"
#include "matrix.h"
#include "mtypes.h"
#include "swrast/swrast.h"
#endif

#include "svgapix.h"
#include "svgamesa8.h"
#include "svgamesa15.h"
#include "svgamesa16.h"
#include "svgamesa24.h"
#include "svgamesa32.h"

struct svga_buffer SVGABuffer;
vga_modeinfo * SVGAInfo;
SVGAMesaContext SVGAMesa;    /* the current context */

#ifdef SVGA_DEBUG

#include <sys/types.h>
#include <signal.h>

FILE * logfile;
char cbuf[1024]={0};

void SVGAlog(char * what)
{
 logfile=fopen("svgamesa.log","a");
 if (!logfile) return;
 fprintf(logfile,"%s\n",what);
 fclose(logfile);
}
#endif

/**********************************************************************/
/*****                       Init stuff...                        *****/
/**********************************************************************/

int SVGAMesaInit( int GraphMode )
{
   vga_init();
   if (!vga_hasmode(GraphMode))
   {
    fprintf(stderr,"GraphMode %d unavailable...",GraphMode);
#ifdef SVGA_DEBUG
    SVGAlog("SVGAMesaInit: invalid GraphMode (doesn't exist)");
#endif
    return(1);
   }
   SVGAInfo=vga_getmodeinfo(GraphMode);
   if (SVGAInfo->flags & IS_MODEX)
   {
    fprintf(stderr,"ModeX not implemented...");
#ifdef SVGA_DEBUG
    SVGAlog("SVGAMesaInit: invalid GraphMode (ModeX)");
#endif
    return(2);
   }
   if (!SVGAInfo->bytesperpixel)
   {
    fprintf(stderr,"1 / 4 bit color not implemented...");
#ifdef SVGA_DEBUG
    SVGAlog("SVGAMesaInit: invalid GraphMode (1 or 4 bit)");
#endif
    return(3);
   }
   switch (SVGAInfo->colors) {
    case   256: SVGABuffer.Depth = 8;  break;
    case 32768: SVGABuffer.Depth = 15; break;
    case 65536: SVGABuffer.Depth = 16; break;
    default: SVGABuffer.Depth = SVGAInfo->bytesperpixel<<3; break;
   }
   SVGABuffer.BufferSize=SVGAInfo->linewidth*SVGAInfo->height;
#ifdef SVGA_DEBUG
   sprintf(cbuf,"SVGAMesaInit: double buffer info.\n" \
                 "              depth  : %d\n" \
                 "              mode   : %d\n" \
		 "              width  : %d\n" \
		 "              height : %d\n" \
		 "              bufsize: %d\n", \
		 SVGABuffer.Depth,GraphMode,SVGAInfo->linewidth, \
		 SVGAInfo->height,SVGABuffer.BufferSize);
   SVGAlog(cbuf);
#endif
   SVGABuffer.FrontBuffer=(void*)malloc(SVGABuffer.BufferSize + 4);
   if (!SVGABuffer.FrontBuffer) {
    {
     fprintf(stderr,"Not enough RAM for FRONT_LEFT_BUFFER...");
#ifdef SVGA_DEBUG
     SVGAlog("SVGAMesaInit: Not enough RAM (front buffer)");
#endif
     return(4);
    }
   }
#ifdef SVGA_DEBUG
   sprintf(cbuf,"SVGAMesaInit: FrontBuffer - %p",SVGABuffer.FrontBuffer);
   SVGAlog(cbuf);
#endif
   SVGABuffer.BackBuffer=(void*)malloc(SVGABuffer.BufferSize + 4);
   if (!SVGABuffer.BackBuffer) {
    {
     free(SVGABuffer.FrontBuffer);
     fprintf(stderr,"Not enough RAM for BACK_LEFT_BUFFER...");
#ifdef SVGA_DEBUG
     SVGAlog("SVGAMesaInit: Not enough RAM (back buffer)");
#endif
     return(5);
    }
   }
#ifdef SVGA_DEBUG
   sprintf(cbuf,"SVGAMesaInit: BackBuffer - %p",SVGABuffer.BackBuffer);
   SVGAlog(cbuf);
#endif

   vga_setmode(GraphMode);
   SVGABuffer.VideoRam=vga_getgraphmem();
#ifdef SVGA_DEBUG
   sprintf(cbuf,"SVGAMesaInit: VRAM - %p",SVGABuffer.VideoRam);
   SVGAlog(cbuf);
   sprintf(cbuf,"SVGAMesaInit: done. (Mode %d)",GraphMode);
   SVGAlog(cbuf);
#endif

   SVGABuffer.DrawBuffer = SVGABuffer.BackBuffer;
   SVGABuffer.ReadBuffer = SVGABuffer.BackBuffer;

   return 0;
}

int SVGAMesaClose( void )
{
   vga_setmode(TEXT);
   free(SVGABuffer.FrontBuffer);
   free(SVGABuffer.BackBuffer);
   return 0;
}

void SVGAMesaSetCI(int ndx, GLubyte red, GLubyte green, GLubyte blue)
{
   if (ndx<256)
      vga_setpalette(ndx, red>>2, green>>2, blue>>2);
}

/**********************************************************************/
/*****                 Miscellaneous functions                    *****/
/**********************************************************************/

static void copy_buffer( const GLubyte * buffer) {
 int size = SVGABuffer.BufferSize, page = 0;

#ifdef SVGA_DEBUG
   sprintf(cbuf,"copy_buffer: copy %p to %p",buffer,SVGABuffer.VideoRam);
   SVGAlog(cbuf);
#endif

 while(size>0) {
 vga_setpage(page++);
  if (size>>16) {
   memcpy(SVGABuffer.VideoRam,buffer,0x10000);
   buffer+=0x10000;
  }else{
   memcpy(SVGABuffer.VideoRam,buffer,size & 0xffff);
  }
  size-=0xffff;
 }
}

static void get_buffer_size( GLcontext *ctx, GLuint *width, GLuint *height )
{
   *width = SVGAMesa->width = vga_getxdim();
   *height = SVGAMesa->height = vga_getydim();
}

static GLboolean set_draw_buffer( GLcontext *ctx, GLenum buffer )
{
   if (buffer == GL_FRONT_LEFT) {
      SVGABuffer.DrawBuffer = SVGABuffer.FrontBuffer;
#if 0
      /*    vga_waitretrace(); */
      void * tmpptr;
      copy_buffer(SVGABuffer.FrontBuffer);
      tmpptr=SVGABuffer.BackBuffer;
      SVGABuffer.BackBuffer=SVGABuffer.FrontBuffer;
      SVGABuffer.FrontBuffer=tmpptr;
#endif
      return GL_TRUE;
   }
   else if (buffer == GL_BACK_LEFT) {
      SVGABuffer.DrawBuffer = SVGABuffer.BackBuffer;
#if 0
      /*    vga_waitretrace(); */
      copy_buffer(SVGABuffer.BackBuffer);
#endif
      return GL_TRUE;
   }
   else
      return GL_FALSE;
}


static void set_read_buffer( GLcontext *ctx, GLframebuffer *colorBuffer,
                             GLenum buffer )
{
   /* We can ignore colorBuffer since we don't support a MakeCurrentRead()
    * function.
    */
   (void) colorBuffer;

   if (buffer == GL_FRONT_LEFT) {
      SVGABuffer.ReadBuffer = SVGABuffer.FrontBuffer;
#if 0
      void * tmpptr;
      /*    vga_waitretrace(); */
      copy_buffer(SVGABuffer.FrontBuffer);
      tmpptr=SVGABuffer.BackBuffer;
      SVGABuffer.BackBuffer=SVGABuffer.FrontBuffer;
      SVGABuffer.FrontBuffer=tmpptr;
#endif
   }
   else if (buffer == GL_BACK_LEFT) {
      SVGABuffer.ReadBuffer = SVGABuffer.BackBuffer;
#if 0
      /*    vga_waitretrace(); */
      copy_buffer(SVGABuffer.BackBuffer);
#endif
   }
}

/**********************************************************************/
/*****                                                            *****/
/**********************************************************************/

static void svgamesa_update_state( GLcontext *ctx, GLuint new_state )
{
   /* Initialize all the pointers in the DD struct.  Do this whenever */
   /* a new context is made current or we change buffers via set_buffer! */

   ctx->Driver.UpdateState = svgamesa_update_state;

   ctx->Driver.GetBufferSize = get_buffer_size;
   ctx->Driver.SetDrawBuffer = set_draw_buffer;
   ctx->Driver.SetReadBuffer = set_read_buffer;

   /* Software rasterizer pixel paths:
    */
   ctx->Driver.Accum = _swrast_Accum;
   ctx->Driver.Bitmap = _swrast_Bitmap;
   ctx->Driver.CopyPixels = _swrast_CopyPixels;
   ctx->Driver.DrawPixels = _swrast_DrawPixels;
   ctx->Driver.ReadPixels = _swrast_ReadPixels;

   ctx->Driver.PointsFunc = NULL;
   ctx->Driver.LineFunc = NULL;
   ctx->Driver.TriangleFunc = NULL;

   switch (SVGABuffer.Depth) {
    case  8: ctx->Driver.ClearIndex = __clear_index8;
             ctx->Driver.Clear 	    = __clear8;

             ctx->Driver.ReadCI32Span         = __read_ci32_span8;
             ctx->Driver.ReadCI32Pixels       = __read_ci32_pixels8;
             ctx->Driver.WriteCI8Span         = __write_ci8_span8;
             ctx->Driver.WriteCI32Span        = __write_ci32_span8;
             ctx->Driver.WriteCI32Pixels      = __write_ci32_pixels8;
             ctx->Driver.WriteMonoCISpan      = __write_mono_ci_span8;
             ctx->Driver.WriteMonoCIPixels    = __write_mono_ci_pixels8;
#ifdef SVGA_DEBUG
    SVGAlog("SVGAUpdateState: 8 bit mode.");
#endif

	     break;
    case 15: ctx->Driver.ClearColor = __clear_color15;
             ctx->Driver.Clear 	    = __clear15;

             ctx->Driver.ReadRGBASpan         = __read_rgba_span15;
             ctx->Driver.ReadRGBAPixels       = __read_rgba_pixels15;
             ctx->Driver.WriteRGBASpan        = __write_rgba_span15;
             ctx->Driver.WriteRGBAPixels      = __write_rgba_pixels15;
             ctx->Driver.WriteMonoRGBASpan    = __write_mono_rgba_span15;
             ctx->Driver.WriteMonoRGBAPixels  = __write_mono_rgba_pixels15;
#ifdef SVGA_DEBUG
    SVGAlog("SVGAUpdateState: 15 bit mode.");
#endif
	     break;
    case 16: ctx->Driver.ClearColor = __clear_color16;
             ctx->Driver.Clear 	    = __clear16;

             ctx->Driver.ReadRGBASpan         = __read_rgba_span16;
             ctx->Driver.ReadRGBAPixels       = __read_rgba_pixels16;
             ctx->Driver.WriteRGBASpan        = __write_rgba_span16;
             ctx->Driver.WriteRGBAPixels      = __write_rgba_pixels16;
             ctx->Driver.WriteMonoRGBASpan    = __write_mono_rgba_span16;
             ctx->Driver.WriteMonoRGBAPixels  = __write_mono_rgba_pixels16;
	     break;
#ifdef SVGA_DEBUG
    SVGAlog("SVGAUpdateState: 16 bit mode.");
#endif
    case 24: ctx->Driver.ClearColor = __clear_color24;
             ctx->Driver.Clear 	    = __clear24;

             ctx->Driver.ReadRGBASpan         = __read_rgba_span24;
             ctx->Driver.ReadRGBAPixels       = __read_rgba_pixels24;
             ctx->Driver.WriteRGBASpan        = __write_rgba_span24;
             ctx->Driver.WriteRGBAPixels      = __write_rgba_pixels24;
             ctx->Driver.WriteMonoRGBASpan    = __write_mono_rgba_span24;
             ctx->Driver.WriteMonoRGBAPixels  = __write_mono_rgba_pixels24;
	     break;
#ifdef SVGA_DEBUG
    SVGAlog("SVGAUpdateState: 32 bit mode.");
#endif
    case 32: ctx->Driver.ClearColor = __clear_color32;
             ctx->Driver.Clear 	    = __clear32;

             ctx->Driver.ReadRGBASpan         = __read_rgba_span32;
             ctx->Driver.ReadRGBAPixels       = __read_rgba_pixels32;
             ctx->Driver.WriteRGBASpan        = __write_rgba_span32;
             ctx->Driver.WriteRGBAPixels      = __write_rgba_pixels32;
             ctx->Driver.WriteMonoRGBASpan    = __write_mono_rgba_span32;
             ctx->Driver.WriteMonoRGBAPixels  = __write_mono_rgba_pixels32;
   }	
}

/*
 * Create a new VGA/Mesa context and return a handle to it.
 */
SVGAMesaContext SVGAMesaCreateContext( GLboolean doubleBuffer )
{
   SVGAMesaContext ctx;
#ifndef DEV
   GLboolean rgb_flag;
   GLfloat redscale, greenscale, bluescale, alphascale;
   GLint index_bits;
   GLint redbits, greenbits, bluebits, alphabits;
   /* determine if we're in RGB or color index mode */
   if ((SVGABuffer.Depth==32) || (SVGABuffer.Depth==24)) {
      rgb_flag = GL_TRUE;
      redscale = greenscale = bluescale = alphascale = 255.0;
      redbits = greenbits = bluebits = 8;
      alphabits = 0;
      index_bits = 0;
   }
   else if (SVGABuffer.Depth==8) {
      rgb_flag = GL_FALSE;
      redscale = greenscale = bluescale = alphascale = 0.0;
      redbits = greenbits = bluebits = alphabits = 0;
      index_bits = 8;
   }
   else if (SVGABuffer.Depth==15) {
      rgb_flag = GL_TRUE;
      redscale = greenscale = bluescale = alphascale = 31.0;
      redbits = greenbits = bluebits = 5;
      alphabits = 0;
      index_bits = 0;
   }
   else if (SVGABuffer.Depth==16) {
      rgb_flag = GL_TRUE;
      redscale = bluescale = alphascale = 31.0;
      greenscale = 63.0;
      redbits = bluebits = 5;
      greenbits = 6;
      alphabits = 0;
      index_bits = 0;
   }

   ctx = (SVGAMesaContext) calloc( 1, sizeof(struct svgamesa_context) );
   if (!ctx) {
      return NULL;
   }

   ctx->gl_vis = _mesa_create_visual( rgb_flag,
                                      doubleBuffer,
                                      GL_FALSE,  /* stereo */
                                      redbits, greenbits,
                                      bluebits, alphabits,
                                      index_bits,
                                      16,   /* depth_size */
                                      8,    /* stencil_size */
                                      16, 16, 16, 16,   /* accum_size */
                                      1     /* samples */
                                      );

   ctx->gl_ctx = _mesa_create_context( ctx->gl_vis,
                                       NULL,  /* share list context */
                                       (void *) ctx, GL_TRUE );

   _mesa_enable_sw_extensions(ctx->gl_ctx);

   ctx->gl_buffer = _mesa_create_framebuffer( ctx->gl_vis,
                                              ctx->gl_vis->depthBits > 0,
                                              ctx->gl_vis->stencilBits > 0,
                                              ctx->gl_vis->accumRedBits > 0,
                                              ctx->gl_vis->alphaBits > 0 );

   ctx->width = ctx->height = 0;  /* temporary until first "make-current" */
#endif
   return ctx;
}

/*
 * Destroy the given VGA/Mesa context.
 */
void SVGAMesaDestroyContext( SVGAMesaContext ctx )
{
#ifndef DEV
   if (ctx) {
      _mesa_destroy_visual( ctx->gl_vis );
      _mesa_destroy_context( ctx->gl_ctx );
      _mesa_destroy_framebuffer( ctx->gl_buffer );
      free( ctx );
      if (ctx==SVGAMesa) {
         SVGAMesa = NULL;
      }
   }
#endif
}

/*
 * Make the specified VGA/Mesa context the current one.
 */
void SVGAMesaMakeCurrent( SVGAMesaContext ctx )
{
#ifndef DEV
   SVGAMesa = ctx;
   svgamesa_update_state( ctx->gl_ctx, ~0 );
   _mesa_make_current( ctx->gl_ctx, ctx->gl_buffer );

   if (ctx->width==0 || ctx->height==0) {
      /* setup initial viewport */
      ctx->width = vga_getxdim();
      ctx->height = vga_getydim();
      _mesa_set_viewport( ctx->gl_ctx, 0, 0, ctx->width, ctx->height );
   }
#endif
}

/*
 * Return a handle to the current VGA/Mesa context.
 */
SVGAMesaContext SVGAMesaGetCurrentContext( void )
{
   return SVGAMesa;
}

/*
 * Swap front/back buffers for current context if double buffered.
 */
void SVGAMesaSwapBuffers( void )
{
#if 000
   void * tmpptr;
#endif

   /* vga_waitretrace(); */
   copy_buffer(SVGABuffer.BackBuffer);

#ifndef DEV
   _mesa_swapbuffers( SVGAMesa->gl_ctx );
   if (SVGAMesa->gl_vis->doubleBufferMode)
#endif /* DEV */
   {
#ifdef SVGA_DEBUG
      sprintf(cbuf,"SVGAMesaSwapBuffers : Swapping...");
      SVGAlog(cbuf);
#endif /* SVGA_DEBUG */
#if 000
      tmpptr=SVGABuffer.BackBuffer;
      SVGABuffer.BackBuffer=SVGABuffer.FrontBuffer;
      SVGABuffer.FrontBuffer=tmpptr;
#endif
#ifdef SVGA_DEBUG
      sprintf(cbuf,"SVGAMesaSwapBuffers : WriteBuffer : %p\n"
              "                      Readbuffer  : %p", \
              SVGABuffer.BackBuffer, SVGABuffer.FrontBuffer );
      SVGAlog(cbuf);
#endif /* SVGA_DEBUG */
   }
}

#else /*SVGA*/

/*
 * Need this to provide at least one external definition when SVGA is
 * not defined on the compiler command line.
 */

int gl_svga_dummy_function(void)
{
   return 0;
}

#endif  /*SVGA*/